diff --git a/engines/zvision/scripting/sidefx/music_node.cpp b/engines/zvision/scripting/sidefx/music_node.cpp
index e9baadb011a7..b1e16e71ef09 100644
--- a/engines/zvision/scripting/sidefx/music_node.cpp
+++ b/engines/zvision/scripting/sidefx/music_node.cpp
@@ -49,7 +49,7 @@ MusicNode::MusicNode(ZVision *engine, uint32 key, Common::String &filename, bool
 	_pantrackPosition = 0;
 	_sub = NULL;
 
-	Audio::RewindableAudioStream *audioStream;
+	Audio::RewindableAudioStream *audioStream = NULL;
 
 	if (filename.contains(".wav")) {
 		Common::File *file = new Common::File();
diff --git a/engines/zvision/scripting/sidefx/syncsound_node.cpp b/engines/zvision/scripting/sidefx/syncsound_node.cpp
index 2bfdc349d108..39542675eb1d 100644
--- a/engines/zvision/scripting/sidefx/syncsound_node.cpp
+++ b/engines/zvision/scripting/sidefx/syncsound_node.cpp
@@ -41,7 +41,7 @@ SyncSoundNode::SyncSoundNode(ZVision *engine, uint32 key, Common::String &filena
 	_syncto = syncto;
 	_sub = NULL;
 
-	Audio::RewindableAudioStream *audioStream;
+	Audio::RewindableAudioStream *audioStream = NULL;
 
 	if (filename.contains(".wav")) {
 		Common::File *file = new Common::File();
diff --git a/engines/zvision/sound/zork_raw.cpp b/engines/zvision/sound/zork_raw.cpp
index a0f660f65fee..1581210c86be 100644
--- a/engines/zvision/sound/zork_raw.cpp
+++ b/engines/zvision/sound/zork_raw.cpp
@@ -259,7 +259,7 @@ Audio::RewindableAudioStream *makeRawZorkStream(const Common::String &filePath,
 	Common::String fileName = getFileName(filePath);
 	fileName.toLowercase();
 
-	SoundParams soundParams;
+	SoundParams soundParams = {};
 
 	if (engine->getGameId() == GID_NEMESIS) {
 		for (int i = 0; i < 32; ++i) {